Multi-pinion gear digital beam torque wrench
US8166853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2011 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Nov 7, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/1425
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A digital torque wrench includes a position sensor assembly which measures the movement of a load beam with respect to an indicator beam to determine the torque being applied to a working element by the torque wrench. The position sensor assembly includes a first position sensor portion having multiple rotatable pinion gears coupled to a potentiometer, and includes a second position sensor portion having a rack gear that engages one of the pinion gears of the first position sensor portion. The first and second position sensor portions are attached to different ones of the load beam and the indicator beam so that at least one of the pinion gears rotates along the rack gear in response to force (torque) being applied through the load beam to the working element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.